--- service: i.root-servers.net start-period: '2015-08-20T00:00:00Z' end-period: '2015-08-21T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3859406778 dns-udp-queries-received-ipv6: 275253508 dns-tcp-queries-received-ipv4: 30735895 dns-tcp-queries-received-ipv6: 377504 dns-udp-responses-sent-ipv4: 5407921293 dns-udp-responses-sent-ipv6: 275253013 dns-tcp-responses-sent-ipv4: 30780947 dns-tcp-responses-sent-ipv6: 383612